Window-sash construction



Sept. 10, 1929. E. c. LoETscl-IER WINDOW SASH CONSTRUCTION Filed April 28, 1927 'L7/fu gwwntoz abbot/nui Patented Sept. 10, 1929.

UNITED STATES EMIL C. LOETSCHER,

on n trisnenia4 IOWA.

WINDOW-SASH CONSTRUCTION.

Application filed April 28,

This invention relates to wood frames and the like, and particularly to wood window sashes.

Heretofore, it has been customary in manufacturing wood window sashes to connect the top and bottom cross rails to the side stiles by mortise and tenon joints interlocked by nails or the like. This method of joining the elements does not make a very firm sash and lo the latter may easily be forced out of ,square by slight pressure on the corners, due to the fact that the nails do not obtain a firm bearing on the wood on account of being of such small diameter. The elements of the sashes, as

heretofore made, are also difficult to assemble.

The primary obj ect of the present invention is to improve the construction of window sashes and the like, to provide stronger joints for the same, and to make it possible to dispense with the pinning operation and the assembling of the sash parts by hand, preparatory for the pinning operation.

A still further object is to furnish a window sash, the side stiles of which may be joined and interlocked with the cross rails by sim ply moving the side stiles toward each other While they are enga-ged with the cross rails.

l/Vith the foregoing obj ects outlined and with other objects in view which will appear as the description proceeds, the invention con` sists in the novel features hereinafter describe-d in detail, illustrated in the accompanying drawings, and more particularly pointed out in the appended claims.

Referring to the drawings,

Fig. l is a top plan view of a portion of a window sash made in accordance with my invention.

Fig. 2 is an elevation of the same.

Fig. 3 is a bottom plan view thereof.

Fig. 4 is an end view of the same.

Fig. 5 is an elevation of a threaded dowel pin forming part of the invention.

Fig. 6 is a view similar to Fig. 4, but show ing a modification.

Fig. Z is an enlarged vertical sectional View of the frame, taken on line 7 7 of Fig. 2.

In the drawing, l designates the bottom rail, 2 the top or check rail, and 8 a side stile Serial No. 187,261.

of a window sash formed in accordance with my invention.

As shown in Fig. 3, the bottom rail is provided at each end with a vertical. groove 4 which interlocks with a vertical rib 5 on the stile when the parts are connected.

The stileis connected to the bottom rail by threaded dowel pins 6, one of which is shown in Fig. 5. This pin be made of metal or wood, preferably'the latter, and it consists of a central portion 7 from f which extends threaded pins 8, the threads of which are of opposite pitch and made very steep, at least degrees, so that yas the side stile is pressed toward the rail, the dowel will automatically turn in the rail and stileand thus interlock the parts together. 'f

This form of dowel facilita-tes the rapid assembly of the parts, and when the parts have been forced to the position shown in Fig. 2, the dowel pins are concealed and form interlocking means which effectively prevent the parts from moving away from each other.

The top of the stile ils provided with spaced tenons or tongues 9, l0, the former of which is provided with a substantially horizontal lprojecting' bead or semi-cylindrical rib 1l.

The end of the check rail 2 is provided with somewhat similartenons l2 and 13 which en gage the tenons 9 and 10 when the parts are assembled. The tenon 12 is provided with a substantially horizontally disposed semicylidrical recess 14 to rreceive the rib ll, and this recess and rib prevents the rail 2 from moving upwardly relatively to the stile, after the parts are assembled.

At this corner of the sash, the parts are also interlocked together by one of the dowel pins 6, which preferably enters the tenon 9 when the stile is forced toward the side rail.

- Instead of making the 'rib and recess of semi-cylindrical formation, as shown in Figs.

l4 and 7, they may be made angular, as at l5 in Fig. 6; However, ineithcr case,"tl1e rib on the side of the tenen 9 will effectively prevent the top cross rail from rising relatively to the side stile.

Tn assembling the parts., the dowels G are rst driven slightly into the rails l and 2, and

then the stile is placed against the outer ends t of the dovvels and forced towards the rails. This causes the doWels to automatically turn in the Wood, and to draw the parts together as the pressure increases.

Instead of driving the doWel in straight, that is, at right angles to the end of a cross rail, it may be tilted slightly in one direction or the other, and it Will then have a tendency to hold the jointrigid in tWo directions instead of one.

Furthermore, the rib l1 and groove 1d may be inclined slightly if desired, so that as the stile is pressed on to the check rail, there Will be a tendency for the check rail to draW closer to the stile, making a tight joint AWhere the rail meets the latter.

Of course, the dovvels and abuttingsurfaces ofthe parts may be provided ivithfglue be- Jfore assembly, and this will facilitate the permanency of the joints. It is to be noted that the construction which Iy have devised perf mits, to some extent, the making 'of the parts on machines now 1n use, and allows more rapid assembly by machine than was heretofore possible. In addition, the parts, after assembly, remain i-rm and the joints are not easily loosened.

From the foregoing, it is believed thatthe construction, operation and advantages of the invention will be apparent to those skilled in the art, and it is obvious that'various changes may be made in the details disclosed Without departing from the spirit of the invention, as expressed in the claims,

lVhat I claim and desire to secure by Letters Patent is:

l. In a frame, a cross rail member and a side stile member, each provided with interengaging tenons, a tenon on one member having a cross rib, and a tenon on the other member having a groove parallelV to the' rib and adapted to receive said rib, and concealed meansfor interlocking said tenons together.

2. In a Jframe, a cross rail .member and a side stile member, each of said members having' interengaging tenons, a rib on a tenon of one of the members arranged transversely to the latter, a tenon on the other mem-ber having' a longitudinally disposed groove parallel to the rib and adapted to receive said rib, and concealed means interlocking said tenons to- .get-her.

3. In a trame, a cross rail and a side stile, the cross rail and side stile having interengaging tenons at their ends, one vof said tenons having a transversely disposed rib thereon, and another one of the tenons having a longitudinally disposed groove parallel to the rib and to receive said rib, and a concealed dowel pin connecting the ends of the cross rail and stile and extending longitudinally of the cross rail.

In testimony whereof I atiix my signature.

EMIL C. LOETSCHER. 

